*body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #eef2f3;
}
.header {
    width: 100%;
    height:200px;
}

#hi1 {
    width:100%;
    height:320px;
}
.dh >ul{
    height: 50px;
    width: 100%;
    margin-bottom: 20px;
    padding: 0px;
    margin-top: 100px;
    display: inline-flex;
    background-color: forestgreen;
}
.dh >ul> li{
    height: 30px;
    width: 100%;
    display:inline-block;
    list-style: none;
    font-size: 0.9em;
}
.dh ul li a{
    text-align: center;
    color: #EEEEEE;
    font-size: larger;
    font-family: 楷体;
    width: 100%;
    margin: 0px;
    text-decoration: none;
    display: block;
    background-color: forestgreen ;
    line-height: 50px;
    border-bottom: 0px solid rgb(168,164,172);
}
.dh ul li a:hover{
    color: #FFD700;
    background-color: chartreuse;
    border-bottom:3px solid darkolivegreen;
}
.dh ul li ul{
    list-style: none;
    display: flex;
    position: absolute;

}

nav ul {
    list-style-type: none;
    padding: 0;
}

nav ul li {
    display: inline;
    margin: 0 15px;
}

nav ul li a {
    color: white;
    text-decoration: none;
}

main {
    padding: 20px;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table, th, td {
    border: 1px solid #ccc;
}

th, td {
    padding: 10px;
    text-align: center;
    background-color: white;
}

button {
    background-color: #4CAF50;
    color: white;
    border: none;
    padding: 10px;
    cursor: pointer;
}

button:hover {
    background-color: #45a049;
}

footer {
    text-align: center;
    padding: 15px;
    background-color: #4CAF50;
    color: white;
}
button{
	margin-top: 20px;
}